Elastic-fluid turbine.



Attorneys PATENTED DEC. 19, 1905.

0. G. CURTIS.

- ELASTIC FLUID TURBINE. APPLICATION rmm sum; 1B, 1903 asses:

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UNITED STATES PATENT OFFICE- CHARLES G. CURTIS, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGN- MENTS, TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

ELASTIC-FLUID TURBINE.

1'0 (Ll/l whom, it may concern.-

Be it known that I, CHARLES Gr. CURTIS, a citizen of the United States, residing in the borough of Manhattan, city of New York, State of New York, have invented a certain new and useful Improvement in Elastic-Fluid Turbines, of which the following is a description.

My invention relates to elastic-fluid tur bines and involves the principle of vane action described in my application for patent filed January 19, 1898, Serial No. 6611M, wherein, the rotative stress or driving effect is produced upon the vanes by a conversion of ms m'ca into pressure in the anterior portions of the vane-spaces and a conversion of pressure into m's aim in the posterior portions of the vane-spaces.

It is undesirable in some cases to provide the movable vane-spaces with convergent anterior portions or with divergent posterior portions. The movable Vane-space which constitutes my present invention is not provided with these features, but has parallel opposing walls in its receiving and discharging portions, except in cases where the enlarged chamber is carried to the ends of the opposing walls, when the receiving and discharging ends of the vane-space become simply orifices properly located and having the proper actual and relative sizes and angular positions. I have also found that a rectangular cross-section of the vane-spaces is better adapted for movable vane-spaces operated upon this principle, in that larger circumferential dimensions can be secured for the enlarged chambers at the center of the vane-spaces with a definite thickness of the vanes at this point.

In fact, my improved vane-spaces may be re-.

of one of the vane-spaces of Fig. l on the lines 3 3, 4 4, and 5 5, respectively, in that figure.

Specification of Letters Patent.

Application filed June 18, 1903. Serial No. 162,014.

Patented Dec. 19, I905.

Fig. 6 isa view similar to Fig. 1, illustrating a modified form of the vane-spaces; and Fig. 7 is a View similar to Fig. 2, taken on the line 7 7 in Fig. 6. The cross-sections shown in Figs. 3, 4, and 5 also represent similar sections in Fig. 6.

A represents the vanes, the spaces between which are closed by top and bottom walls B, the shape of the faces of the vanes and of the inner surfaces of the top and bottom walls determining the character of the vane-spaces.

In Fig. 1 each vane-space has anterior and posterior portions C D, which have parallel opposing side walls, as illustrated in Fig. 1,

and parallel top and bottom walls, as illustrated in Fig. 2. These anterior and posterior portions of the vane-spaces project at the proper angle from the sides toward the center of the wheel, and they have the proper relative'and actual sizes, the top and bottom walls of the posterior portions being separated a greater distance than the similar walls of the anterior portions of the vanespaces,as illustrated in Figs. 2, 3 and 5, to secure the proper relative sizes. Between the anterior and posterior portions C D each vane-space is provided with an enlarged chamber E, which is produced by separating the front and back walls of the vane-space as much as possible, the opposing walls being preferably straight parallel surfaces, the additional enlargement required being given by hollowing out the top and bottom walls, as shown in Fig. 2. The vane-spaces havea rectangular cross-section, as illustrated by Figs. 3, 4:, and 5, which permits of the maximum cross-sectional area with a given thickness of the vanes. To produce sharp edges at the ends of the vanes, the rearward wall of each vane-space where extended outwardly to the edge of wheel beyond the opposing forward wall may be beveled, as shown at a. The jet of elastic fluid is received from the nozzle or from stationary guidevanes at the proper angle by the anterior portions C of the vane-spaces in a forward direction and is discharged in a rearward direction by the posterior portions D of the vane-spaces. The ads mica of the elastic fluid is converted into pressure in the enlarged chamber E. The vane action is that described in my application before referred to. In Figs. 6 and 7 the form of the vane-spaces is modified to the extent that the enlarged chambers E are carried to the sides of the Wheel, being extended to the outer ends of the opposing portions of the side Walls of the vane-spaces. With this form the posterior and anterior portions become simply orifices of proper actual and relative sizes and Whose axial lines have the proper angular positions.

What I claim is 1. An elastic-fluid turbine havingamovable vane-space, the said vane-space having a greater cross-sectional area at its center than at either end, and a non-convergent anterior receiving portion, substantially as set forth.

2. An elastic-fluid turbine havinga movable vane-space, the said vane-space having a greater cross-sectional area at its center than at either end, and a non-divergent posterior discharging portion, substantially as set forth.

3. An elastic-fluid turbine havinga movable vane-space, the said vane-space having a greater cross-sectional area at its center than ateither end, and provided with a non-convergent anterior receiving portion and a nondivergent posterior discharging portion, substantially as set forth.

4:. An elastic-fluid turbine having a movable vane-space, the said vane-space having a greater cross-sectional area at its center than at its end, and an anterior receiving portion having parallel opposing Walls, substantially as set forth.

5. An elastic-fluid turbine having a movable vane-space, the saidvane-space having a greater cross-sectional area at its center than at either end, and a posterior discharging portion having parallel opposing Walls, substantially as set forth.

6. An elastic-fluid turbine having amovable vanespace, the said vane-space having a greater cross-sectional area at its center than at either end, and provided with an anterior receiving portion having parallel opposing Walls and a posterior discharging portion having parallel opposing Walls, substantially as set forth.

7. An elastic-fluid turbine havinga movable vane space, the saidv vane-space having a greater cross-sectional area at its center than at either end and of rectangular cross-section throughout its length, substantially as set forth.

This specification signed and witnessed this 8th day of June, 1903.

CHARLES G. CURTIS.

Witnesses:

J No. RoBT. TAYLOR, JOHN LOUIS LOTSCH. 

